They tried but Ukrainians air defense from ground based units was taking them out apparently their comm is crap and their guidance systems are so bad they were using their cell phones for navigation. If you see aircraft or helicopters over Ukraine they are flying treetop banking up praying and spraying missiles and getting out of dodge
On top of that mission ready aircraft are scarce, aircrew scarcer, suffer from same thing the rest of the military does. Corruption which siphoned off
Military effectiveness
They tried but Ukrainians air defense from ground based units was taking them out apparently their comm is crap and their guidance systems are so bad they were using their cell phones for navigation.
Commercial GPS, too. There was a hilarious photo early in the war of a Garmin GPS taped to the instrument panel of a SU-34.